Westlake Landfill Site Administrative Record Bridgeton, Missouri Introduction and Index This index of documents for the Westlake North Quarry Removal Administrative Record #64478 lists documents that form the basis for the selection by the U.S. Environmental Protection Agency of a response action for the Westlake Landfill Site, Operable Unit (01). All documents included in EPA's Compendium of CERCLA Response Selection Guidance Documents, OSWER 9833.4, as revised, arc hereby included in the Administrative Record by reference. All previous Administrative Records for this matter are incorporated in this Administrative Record by reference. This Administrative Record is available for public review at the: U.S. Environmental Protection Agency Region 7 Records Center 11201 Renner Blvd. Lenexa, KS 66219 EPA has assessed the ability of the local public to access this Administrative Record through an internet-based repository and has determined that the local community has this ability. As a result, EPA is making the administrative record for this site available through the following internet site: https://semspub.epa.gov/src/collections/07/AR6447S ------- 5 58 6 43 12 42 161 8 14 5 5 61 4 41 4 2 .54 44 32 2 3 4 20 18 14 Document Date Undated 7/25/2008 1/10/2013 5/13/2013 6/18/2014 9/27/2013 12/1/2014 8/10/2015 4/24/2014 8/29/2014 Undated 5/26/2015 12/4/2015 1/20/2016 12/4/2015 6/20/2014 11/2/2015 8/25/2015 6/17/2013 10/3/2012 3/25/2016 4/15/2015 11/1/2015 9/9/2015 9/9/2015 Title Administrative Record Index Record of Decision Memorandum regarding Gas Interceptor Well Design First Agreed Order of Preliminary Injunction for Case #: 13SL CC01088 Letter containing comments on the Work Plan for Removal Action Preconstruction Work dated 05/16/13 and related documents Gamma Cone Penetration Test (GCPT) Work Plan Revision #:2 Bridgeton Landfill Thermal Isolation Barrier Investigation Phase 1 Report Letter regarding the review of the Corrective Action Assessment and Plan for the Neck Area and North Quarry Letter transmitting a Memorandum containing Comments on the Evaluation of Possible Impacts of a Potential Subsurface Smoldering Event (SSE) on the Record of Decision (ROD) Selected Remedy and related documentation Memorandum containing the Data Package Review for the Months of July and August 2014 Draft Deliberative regarding Bridgeton Landfill Data Review Update for data collected July 2014 Interim Data Summary of Ongoing Baseline Off-site Air Monitoring Via Sampling for Volatile Organic Compounds and Hydrogen Sulfide By Application of Passive/Diffusive Sampling Methods Letter Regarding Technical Evaluation of a Heat Extraction Barrier Submittal Expanded Heat Removal Pilot Study Quarterly Report Letter Responding to Submittal of Technical Evaluation of a Heat Extraction Barrier Letter regarding Status of Subsurface Smoldering Event and Incident Management Plan Letter regarding Technical Evaluation of Heat Extraction Barrier Letter regarding Corrective Action Assessment Plan Data Evaluation of the Subsurface Smoldering Event at the Bridgeton Landfill Certified Letter Regarding Subsurface Smoldering Event, Gas System Expansion, Gas Migration and Odor Control Letter Responding to Inert Gas Injection Work Plan Approval Certified Mail Letter Regarding Bridgeton Sanitary Landfill Permit Number 0118912, Subsurface Fire Letter Regarding Supplement to Isolation Barrier Alternatives Analysis Inert Gas Injection Work Plan for Hot Spot Remediation Evaluation of Remedial Action Approaches for Hot Spot Remediation ------- 2 271 168 10 3 2 43 5 18 15 15 21 83 323 2 4 2 33 8 425 322 1 316 12 6 2 9/27/2013 Letter Regarding North Quarry Contingency Plan - Part 2 7/22/2015 Letter Transmitting Sulfur Removal Technology Evaluation (Stage 2) - Final Report 11/30/2014 Corrective Action Plan Potential Northward Progression of Subsurface Smoldering Event 6/2/2014 Letter Providing Comments on Operations, Maintenance, and Monitoring Plan, Volume 1 6/24/2013 Memorandum Regarding Response to Data Evaluation of the Subsurface Smoldering Event 5/20/2015 Letter Responding to Bridgeton Landfill's May 8, 2015 Letter 5/7/2013 Letter Responding to Comments Temporary Cap & Cap Integrity System CQA Plan Bridgeton Landfill 12/1/2015 Drawings for December 2015 Landfill Gas Enhancements 2/6/2013 Gas Interceptor Well Expanded Design (Permit #0118912) at Bridgeton Landfill Bridgeton Landfill, Bridgeton, Missouri 9/13/2012 TMP Installations: Bridgeton Landfill 4/24/2015 Preliminary Air Modeling Protocol - Request for Approval Bridgeton Landfill 5/8/2015 Response to MDNR Letter of May 1, 2015 Bridgeton Landfill, LLC (Bridgeton) 9/1/2013 OPERATION, MAINTENANCE, AN MONITORING PLAN VOLUME 2Gas and Subsurface Control Systems 11/12/2013 Bridgeton Landfill North Quarry Action Plan (Revised) 1/28/2014 North Quarry Action Plan Transmittal of Revision 2 Bridgeton Landfill, Bridgeton, Missouri 5/1/2015 Letter Addressing Requests Made by the Missouri Department of Natural Resources in Letters Dated February 11 and March 25, 2015 11/24/2015 Landfill Gas Collection Enhancements Bridgeton Landfill, Bridgeton, Missouri Permit No 0118912 9/9/2015 Corrective Action Measures for Isolated "Hot Spot" in the North Quarry Bridgeton Landfill, LLC, Bridgeton , Missouri Permit No . 0118912 2/13/2014 Memorandum Regarding Comments on the Evaluation of Possible Impacts of a Potential Subsurface Smoldering Event on the Record of Decision 6/27/2013 Bridgeton Landfill North Quarry Contingency Plan-Part 1 (Draft) 1/28/2014 Bridgeton Landfill North Quarry Action Plan (Revised) 11/5/2014 Letter Regarding Corrective Action Plan Permit No.0118912 7/26/2013 Bridgeton Landfill North Quarry Contingency Plan-Part 2 8/13/2015 North Quarry Contingency Plan-Part 1 Response to July 24, 2013 MDNR Comments Bridgeton Landfill, Bridgeton, Missouri Permit No 0118912 9/24/2015 Corrective Action Assessment and Plan Including Inert Gas Injection - North Area and North Quarry, Bridgeton Sanitary Landfill, Permit No 0118912, St Louis Countv 11/1/2015 Supplement to Isolation Barrier Alternatives Analysis West Lake Landfill Superfund Site, Bridgeton, Missouri ------- 4 5 4 7 1 5 2 2 8 2 4 5 4 5 4 5 4 5 .0 5 '1 !4 2 7/11/2012 Subsurface Smoldering Event, Gas system Expansion, Gas Migration and Odor Control, Bridgeton Sanitary Landfill, Permit No 0118912, St Louis Countv 1/14/2016 Letter regarding contemplating a removal action at the West Lake Land fill in Bridgeton, Missouri. 12/26/2014 November and December Gas Wellfield Data, Bridgeton Sanitary Landfill,Permit Number 0118912, St. Louis County 2/11/2016 Potential State Applicable or Relevant and Appropriate Requirements (ARARs) for a Contemplated Removal Action at Operable Unit 1, West Lake Landfill in Bridgeton, Missouri 6/1/2013 BRIDGETON LANDFILL - EXISTING CONDITIONS 4/24/2014 Letter Regarding MDHSS Comments for Evaluation of Possible Impacts of a Potential Subsurface Smoldering Event 1/29/2015 Letter Regarding Temperature Monitoring Probe Installation Plan 6/24/2013 Letter Responding to Comments and Concerns Raised in Mr. Thalhamer Report on Gas Wellfield Management Bridgeton Landfill 4/20/2015 Response to MDNR Letters of February 11 and March 25, 2015 Bridgeton Landfill 8/27/2013 Letter Responding to Temperature Monitoring Probes, Bridgeton Landfill, Permit Number 0118912 4/20/2015 Bridgeton Sanitary Landfill - Corrective Measures Required to Address Updated Potential Emissions Calculations for Sulfur Dioxide 7/31/2015 Bridgeton Landfill Data Review Update for data collected between June and July 2015 12/31/2015 Bridgeton Landfill Data Review Update for data collected in December 2015 5/31/2015 Bridgeton Landfill Data Review Update for data collected from April and May 2015 10/31/2015 Bridgeton Landfill Data Review Update for data collected in October 2015 3/31/2015 Bridgeton Landfill Data Review Update for data collected between January and March 2015 11/30/2015 Bridgeton Landfill Data Review Update for data collected in November 2015 8/31/2015 Bridgeton Landfill Data Review Update for data collected in August 2015 11/13/2015 Analysis of Temperature, Gas Quality, and Settlement Trends at the Bridgeton Sanitary Landfill in 2014 9/30/2015 Bridgeton Landfill Data Review Update for data collected in September 2015 9/30/2013 Operation, Maintenance & Monitoring Plan Vol: 1 General Requirements and Surface Systems 7/17/2014 Letter Regarding Thalhamer Data Review Permit No. 0118912 2/11/2015 Letter Regarding Sulfur Removal Technology Evaluation, Stage 2 ------- 30286308 5/10/2013 Temporary Cap And Cap Integrity System Plan Narrative Report 22 30286440 5/17/2013 Letter Regarding Temporary Cap And Cap Integrity System Construction Quality Assurance (CQA) Plan 2 30286441 5/17/2013 Map of Temperature Monitoring Probes and Gas Interceptor Wells 1 30286442 3/28/2014 Memorandum Responding to Observations on the EMSI Report: Evaluation of Possible Impacts of a Potential Subsurface Smoldering Event on the Road of Decision - Selected Remedy for ODerable Unit -1 2 30286443 9/24/2014 Memorandum Responding to Draft Observations on Todd Thalhamer's Report to the MDNR: Data Package Review for the Month of Julv and August 2014 3 30286444 1/28/2015 Memorandum Containing Observations on the Existing Temperature Monitoring Probe Data Collected Between August 14,2014 and January 8, 2015 7 30286449 9/30/2014 Bridgeton Landfill Data Review Update August & September 2014 6 30286450 6/30/2014 Bridgeton Landfill Data Review Update June 2014 5 30286451 12/31/2014 Bridgeton Landfill Data Review Update Between October and December 2014 5 30286452 7/31/2014 Bridgeton Landfill Data Review Update Between July 2014 5 30286453 3/31/2014 Bridgeton Landfill Data Review Update March 2014 6 30286454 11/26/2013 Bridgeton Landfill Data Review Update November 2013 4 30286455 2/28/2014 Bridgeton Landfill Data Review Update February 2014 5 30286456 5/30/2014 Bridgeton Landfill Data Review Update May 2014 8 30286457 4/30/2014 Bridgeton Landfill Data Review Update April 2014 7 30286458 1/31/2014 Bridgeton Landfill Data Review Update January 2014 5 ------- |